SDR ASAA2025111163078

Service difficulty report · Intercostal · Boeing 7378FH

Difficulty date: November 11, 2025
Submitted: December 17, 2025
Operation: Air carrier
Aircraft: N549AS
Make and model: Boeing 7378FH
Aircraft serial: 30824
Aircraft time: 68,466 hours, 24,432 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Intercostal
Part number: 147A566022
Condition: Corroded
Location: Zone 200
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

RIGHT AFT INTERCOSTAL AT BS 947.5 APPROX, RBL 51 HAS SEVERAL AREAS OF CORROSION. GROUNDED - YES. REMOVED CORROSION ON INTERCOSTAL AT BS. 947 RBL 51, LOST .045" OF MATERIAL, FOUND BEYOND LIMITS IAW SRM 53-70-51-1A-1, R & R INTERCOSTAL PO 1137621.1 IAW SRM 51-40-02, AND DWG 147A5650, REV A.

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